Aryl and aralkyl derivatives of dialkylaminoalkylureas



UNITED STATES ABYL AND ARALKYL DERIVATIVES F DIALKYLAMINOALKYLUREAS John W. Cusic, Slrokie, ill, assignor to G. D. Searle & 60., Chicago, 111., a corporation of Illinois N0 Drawing. Application August 5, 1950, Serial No. 177,961

11 Claims. (ill. 260-553) ATENT OFFICE l 2 The present invention relates to new groups of circulatory system and a diuretic effect on the urea derivatives and more particularly to comexcretory function of the kidney. The described pounds of the general structural formula quaternary salts act as sympathicolytics and R parasympathicolytics and produce ganglion block. 5 In the preparation of these compounds I pre- Ar-N-ONHAN fer to heat a carbamyl chloride of the type Ar R and salts thereof, wherein A is a bivalent saturated aliphatic hydrocarbon radical. Ar is an aryl group and Ar is a member of the class consisting Ar lcfwir al llyi ri d i c gs. and R and R are with a N,N-dialkylalkylenediamine of the type In the foregoing structural formula the radical R A represents a bivalent, saturated, aliphatic hydrocarbon radical, derived from straight chains or branch chains of hydrocarbons and includes R such radicals as methylene, ethylene, propylene,

butylene amylene hexylene and polymethylene al symbols being of the class defined heremabove.

radicals such as trimethylene, tetramethylene, suitably 111 n hydrous organic solvent in which pentamethylene and hexamethylene. Ar repre- 2 an the Startmg mammals are fsoluble gents, an and group such as phenyly halophenyl, Iviy invention will be descr bed more iully m,

alkylphenyl, alkoxyphenyl, nitrophenyl an the conJunction with the following examples. It

like. Ar is a member of the class consisting of Should be utlderstood ff a these aryl groups of the aforementioned type and amples glven, by W of illustratlon only and aralkyl groups such as benzyl, phenethyl, halomvfmftlon not be constmed as benzyly a-lkylbenzyL alkoxybenzyl and the mm limited in spirit or in scope by the details set Among the radicals which R and may rep forth. It will be apparent to those sk lled 1n resent are such lower alkyl groups as methyl, the art that many modifications in materials and ethyl, propyly butyl amyl: and hexyl, wherein methods may be made without departing from the propyl, butyl amyl and hexyl groups may be H the invention. In each of these examples, temeither of the straight chain or branched chain peratures are given uncorrected in degrees centi' type. grade C.) and amounts of materials in part The organic bases of the foregoing type form by Welght salts with a variety of inorganic and strong or- EXAMPLE 1 ganic acids including sulfuric, phosphoric, hy-

drochloric, hydrobromic, sulfainic, citric, oxalic, lldiphenyl'g'('fi'dimethylammoethyz)We ascorbic and related acids. They also form A solution or" 353 parts of N,N-dimethylethylquaternary ammonium salts with a variety of enediamine in 2400 parts of butanone is mixed organic esters of sulfuric, hydrohalic, and arowith 462 parts of diphenylcarbamyl chloride. A

matic sulfonic acids. Among such esters are 40 vigorous reaction occurs and a solid. mass forms. methyl chloride and bromide, ethyl chloride, After heating at refluxing temperature for 12 propyl chloride, butyl chloride, isobutyl chloride, hours, the solvents are evaporated, and dilute benzyl chloride and bromide; phenethyl bromide, hydrochloric acid and toluene is added. Upon naphthylmethyl chloride, dimethyl sulfate, di- Warming the entire mass enters into solution. ethyl sulfate, methyl benzene sulfonate, ethyl The hydrochloric acid layer is rendered alkaline toluene sulionate, ethylene chlorohydrin, proby addition of dilute sodium hydroxide. It is pylene chlorohydrin, allyl bromide, methallyl then extracted with ether and the ether solution bromide and crotyl bromide. is dried over anhydrous potassium carbonate,

The object of this invention is to provide novel filtered and evaporated. The solid residue is chemical composition of the types, indicated recrystallized first from petroleum ether and above. These urea derivatives are valuable inthen from dilute isopropanol. It is dissolved in termediates in organic synthesis. Some of them ether and treated with a 25% solution of hydrohave been found to possess a number of highly gen chloride in isopropanol. The 1,1diphenyl-3- useful pharmacodynamic properties. Thus the (p-dimethylaminoethyl) urea hydrochloride melts ureas described have a pronounced effect on the at about 221-222 C.

3 EXAIWPLE 2 Diphenylcarbamidoethylirimethylammonium iodide 100 parts of 1,1-diphenyl-3-(li dimethylaminoethyl)urea are reacted with 228 parts of methyl iodide in 4000 parts of butanone in a shielded. pressure reactor. A solid precipitate forms at once. After storage at C. the crystals are filtered. The diphenylcarbamidoethyl-trimethylammonium iodide melts at about 240-241" (J. This compound has the structural formula:

(Col-I5) 2NCO NH-CH2-CH2N(CH3) 3-1.

EXAMPLE 3 1,1-diphent'Z-3- (,8-diethylamino ethyi) area A solution of 696 parts of Nit-diethylethylene diainine in 2400 parts of butanone is reacted with 66d parts of diphenyloarbamyl chloride. After the exothermic reaction subsides the mixture is heated at refluxing temperature for 12 hours. The solvent is evaporated from the clear solution and ice, diluted hydrochloric acid and toluene are added to the residue. The hydrochloric acid layer is rendered all lute sodium hydroxide and then extracted With ether. The ether layer dried over anhydrous potassium carbonate, filtered and evaporated. The residue is dissolved in ether and treated with a solution of hydrogen chloride in isopropanol. The sticky hydrochloride is recrystal-- lized first from a mixture of isopropanol and ether and then from butanone. The Ll-di phenyl-B- e-dietl1ylaminoethyl) urea hydroohloride melts at about 107-108" C. and has a tendency to become purple.

EXAMPLE i Diphenylconbomidccihyidiethylmethg Zammonium iodide 100 parts or" 1,l.-d.ipl1enyl-3-(c-diethylaminoethyhurea are mixed with 228 parts of methyl iodide in 4000 parts of butanone in a shielded pressure vessel. Upon storage at 0 C. a solid begins to appear within an hour. After several further hours of standing at 0 C. the diphenylcarbamidoethyldiethylinethylammonium iodide is collected on a filter. It melts at about 206-207 C. In order to convert this iodide into the citrate 3 moles of the iodide are treated With 1 mole of silver citrate and 2 moles of anhydrous citric acid in isopropanol solution. After stirring at room temperature, the silver iodide is filtered, off. The filtrate is concentrated in vacuo and the dihydrogen citrate is Washed with ether. The iodide has the formula (Calls) :N-CO--NHCH2-CHz-N Czlis) 26213 .1 EXAMPLE 5 1,1 -diphenyZ-3- (y-dimethyZaminopmpg/Z) urea line by the addition of diparts of butanone, 136 parts of methyl iodide are gradually added. A heavy, white precipitate forms within a short time. The diphenylcarbamidopropyltrimethylammonium iodide is recrystallized from dilute isopropanol and melts at about l97-l98 C. It has the structural formula EXAMPLE 7 1,1 -diphenyZ-3- -diethylaminopropyl) urea 695 parts of diphenylcarbamyl chloride and 390 parts of N,N'-diethyltrimethylenediamine in 4400 parts of benzene are mixed and maintained at refiuxing temperature for 12 hours. After addition of dilute hydrochloric acid the aqueous layer is rendered alkaline by treatment with dilute sodium hydroxide and extracted with ether. The ether extract is dried over anhydrous potassium carbonate, filtered and evaporated. The citrate is prepared by treatment of a solutiton of 160 parts or" the 1,1-diphenyl-3-( -diethylaminopropyDurea in isopropanol with 96 parts of anhydrous citric acid. The citrate precipitates on cooling. After drying and recrystallizing from isopropanol it melts at about 81-83 C.

EXAMPLE 8 1 -benzyZ-1 "phenyZ-3- (c-dieihylaminoethyl urea A mixture of 490 parts of benzylphenylcarbarnyl chloride, prepared from benzylaniline and phosgene in dry e her, and l T,l\T-diethylethylenediamine in 2400 parts of butanone is heated at refluxing temperature for 12 hours. The solvent is evaporated dilute hydrochloric acid is added. The hydrochloric acid layer is rendered alkaline by addition of dilute sodium hydroxide and extracted with ether. The other solution is dried over anhydrous potassium carbonate, filtered and evaporated. The hydrochloride is prepared by treatment with a 25% solution of hydrogen chlo ride in anhydrous isopropanol. After recrystallization from butanone the hydrochloride of 1- benzyl 1 phenyl-3-(fl-diethylaminoethyl)urea melts at about 117-118 C.

EXAMPLE 9 1 -b87Z2Z/Z-1 -gohenyZ-3- (ll-diethylaminoethyl) urea methiodide parts of l-benzyL-l-phenyl-3-(,H-diethylaminoethyllurea in 4000 parts of butanone are mixed With 228 parts of methyl iodide and mainat 0 C. for 12 hours. The precipitate is collected on a filter. The l-benzyl-l-phenyl-3- (/3-diethylaminoethyl)urea methiodide melts at about -146 C. It has the structural formula Z JaenzyZ-l -phcnyZ-3- (/l-diethylaminoethyl) u'rea methobromide parts of l-benzyl-l-phenyl-il-(c-diethylaminoethyl) urea in 4000 parts of butanone are treated with 173 parts of methyl bromide in a shielded pressure reactor. The mixture becomes Warm and a solid precipitate forms Within one half hour. After standing at 0 C. for 12 hours, the crystals are ground and collected on a filter. The 1-benzyl-l-phenyl-3- (c-diethylaminoethyl) urea methobromide melts at about 133136 C.

EXAMPLE 11 1 benzyl 1 phenyl 3 ('y dimethylaminoprom/bureau 915 parts of benzylaniline are reacted with 250 parts of phosgene and 7150 parts of dry ether with stirring in an ice bath. After standing for 12 hours, the mixture is filtered and the ether evaporated from the filtrate. 260 parts of N,N- dimethyltrimethylenediamine are added to the residue and heated at refluxing temperature. A heavy precipitate forms within a short time. After standing the precipitate is dissolved in water. The aqueous layer is made alkaline and extracted with ether. The ether extract is dried over anhydrous potassium carbonate, filtered and evaporated. The residue of 1-benzyl-1-phenyl-3-(ydimethylaminopropyhurea is dissolved in ether and treated with a solution of hydrogen chloride in isopropanol. The hydrochloride upon recrystallization from isopropanol melts at about 141-142 C.

EXAMPLE 12 1 (p anzsyl) 1 (p nitrophenethyl) 3- (fl-diisopropylaminoethyl) urea 54'! parts of N(p-nitrophenethyl) -p-anisidine (of. V. A. Izmailskii and Z. M. Bairamov, Journal of General Chemistry 13, 693; 1943) are reacted with 100 parts of phosgene in 4000 parts of 1 EXAMPLE 13 1,3-dz'beneyl-1-phenylcarbanilide A mixture of 245 parts of benzylphenylcarbamyl chloride and 183 parts of benzylaniline in 98 parts of pyridine and 2600 parts of benzene is heated at refluxing temperature for 12 hours. Dilute hydrochloric acid is added to the charge while it is still warm and complete solution ocours. The organic layer is separated and the solvents distilled therefrom in vacuo. The soft solid precipitate is collected on a filter. It melts at about 8'789 C.

I claim: 1. A compound of the class \NO O-NHA-B wherein Ar is an aryl radical of the class consisting of phenyl and methoxyphenyl radicals, Ar

After addition Of dilute is a member of the class consisting of phenyl and lower phenylalkyl radicals, A is a lower bivalent saturated aliphatic hydrocarbon separating the two nitrogen atoms attached thereto by at least two carbon atoms, and B is a lower dialkylamino radical.

2. A 1,1-diphenyl-3-dialkylaminoalkylurea of the structural formula wherein A is a lower bivalent, saturated, aliphatic hydrocarbon radical separating the two nitrogen atoms attached thereto by at least two carbon atoms and R, and R are lower alkyl radicals.

3. A 1,1-diphenyl-3-(p-dialkylaminoethyl)urea of the structural formula 5.21 1-phenyl-1-benzyl-3-dialkylaminoethylurea of the following structural formula Ot s N-C O-NHCH2OH2NRR con 011i wherein R and R are lower alkyl radicals.

6. 1,1 diphenyl 3 ([3 dimethylaminoethyDurea.

7. A 1 phenyl 1 (phenylalkyl) 3 dialkylaminoalkylurea of the following structural formula Ar wherein Ar is a lower phenylalkyl radical, A is a lower bivalent saturated aliphatic hydrocarbon separating the two nitrogen atoms attached thereto by at least two carbon atoms, and R and R are lower alkyl radicals.

8. 1 benzyl 1 phenyl 3 (18 diethylaminoethyl) urea.

9. 1,1 diphenyl 3 ('y dimethylaminopropyl) urea.

10. 1,1 diphenyl 3 ('y diethylaminopropyDurea.

11. 1 benzyl 1 phenyl 3 ('y dimethylaminopropyl) urea.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,050,557 Bockmuhl et a1. Aug. 11, 1936 2,220,508 Bock et a1. Nov. 5, 1940 2,253,773 Engel et a1. Aug. 16, 1941 OTHER REFERENCES Wenker, J. Am. Chem. 500., vol. (1938), pp. 158-159. 

1. A COMPOUND OF THE CLASS 